A knee injury wiped out Ryan Williams' rookie season with the Arizona Cardinals, but it appears increasingly likely he'll be a full go when training camp kicks off later this month.

ProFootballWeekly.com cited a source earlier this week in reporting Williams is "right on schedule, if not a little bit ahead" in his recovery from a torn right patella tendon.

"They were thrilled that he was able to participate in 11-on-11 drills at the mandatory mini, and the medical staff just raves about his work ethic," the source said.

Williams suffered the injury in the Cardinals' third preseason game last August. He was a second-round pick (38th overall) out of Virginia Tech in the 2011 NFL Draft.

If healthy, Williams adds another dimension to a Cardinals running game that includes fourth-year back Beanie Wells and versatile role player LaRod Stephens-Howling.

Coming off a breakout season, Wells -- also recovering from knee surgery -- is the favorite to remain the starter. But Ken Whisenhunt likes two-RB sets, and Williams should have every opportunity to make an impact in his second season.